Plow



July 3l, 1928. 1,678,741

M. MARES v PLOW Filed April 2o, 1925 2 sheets-sheet v1 INVENTOR.MATT/few /V/l/is A TTORNEY.

AJuly 31; 1928. d i 1,678,741

M. MARES PLOW Filed April 20, 1923 2 Sheets-Sheet 2 .IN VEN TOR.

MTW/f w M11/75.5.

Patented July 3l, 1928.

vUNITED STATES MATTHEW MARES, OF RACINE, WISCONSIN.

PLOW.

Application filed April 20,

This invention relates to plows.

In plows heretofore constructed the plow beam is ordinarily disposedsubstantially within the plane of the land side so that the draft lineis offset with respect to the resultant line of plow resistance.balanced condition causes a heavy side thrust which, particularly in thecase of hand plows, results in an objectionable zigzag action on thepart of the plow.

Oneobject of the present invention is the provision of a better balancedplow, whereby this objectionable feature may be overcome.

Another object is the provision of a plow of increased strengthandrigidity in which the mold board, particularly, is securely heldagainst yielding.

Another object is the provision of an adjustable mounting for the moldboard.

Another object is the provision of a plow share which will effect abetter and cleaner cut wit-hout requiring frequent grinding orreplacement of worn parts.

Other objects and advantages will appear from the following descriptionof an illusl trative embodiment of the present invention.

In the drawings: I

Figure 1 is a plan view of a plow constructed in accordance with thepresent invention.

Figure 2 is a side elevation of the land side of the plow.

Figure 3 is a horizontal section taken substantially on the line 3-3 ofFigure 2.

Figure 4 is a sectional view on alarger scale taken substantially on theline 4-4 of Figure 3.

The plow illustrated comprises a rigid inside frame or frog 10 in theform of a. casting having two integral wings 11 and 12. Wing 11 liessubstantially in a vertical plane and constitutes a rigid support forthe land side 13, while wing 12 extends beneath the plow point 14 andplow share plate 15 and is appropriately curved to conform in gen eralwith the mold board 16 supported thereby. The two wings merge in arelatively sharp corner 17 and at the upper ends thereoff are rigidlyconnected by an integral web or plate 18 horizontally disposed andconstituting an appropriate seat for one end of a This un- 2 1923.Serial No. 633,430.

plow beam 19. The plow beam is rigidlv clamped to this sea-t by means ofa bracket plate 20 suitably fashioned to partially embrace the plow beamand secured to the web l by appropriate nut and bolt connections From aninspection of Figure. 1 it will be noted that the plow beam is'laterally disposed with respect tothe land side of the plow toward thecenter of gravity of the plo-w. As above pointed out,'this arrangementof the plow beam is particularly advantageous in that the line of draftis thus made to more nearly coincide withvthe resultant of plowresistance, thus avoidingthe tremendous side thrust and consequent zig-Zag action characteristic of plows of present well known construction.

The mold board 16 is curved in the usual manner and is disposed in adepression 23 in the face of the wing 12 of the frog so that its exposedsurface is substantially flush with the exposed surface of the plowshare plate 15. The lower edges 24 of the mold board 16 thus abut theshoulder 25 formed by the depression 23. At its forward end the moldboard extends over the corner 17 of the frog and is provided with anintegral flange 24 which bears against the face of the wing 11 to retainthe mold board against lengthwise movement. Provision is preferably madefor permitting a slight rocking adjustment of the mold board about itslower edges. In this instance, this adjustment is controlled by a cam 25rotatably mounted upon the face of the wing 11 and bearing at itsperiphery against the edge of the flange 24. The cam is supported uponand held in any position of adjustment by an appropriate clamp screw 26extending therethrough and into the wing 11. An integral lug 27 eX-tendingvfrom the under facey of the mold board and through anappropriate slot in the wing 12 of the frog is adjustably connected tothe wing 11 by bolt connections 28. The rear end of the mold board isalso adjustably secured to the extension 29 of the wing 12 by means ofbolt connections 30 associated with lugs 31 and 32 on the extension 29and mold board, respectively. In this instance, the bolts 3() and lugs31 serve as a means for connecting one of the plow handles 33. Thus itwill be understood that after loosening the bolts 28 and 30 the moldboard may be rocked about its lower edge to the desired position ofadjustment by adjusting the cam and that by'again tightening the bolts28 and they assist the cam in rigidly securing the mold board againstyielding. The mold board may be made of usual material, such as caststeel or iron, but in some 1nstances l prefer to coat the mold boardwith a layer of non-oxidizing material, such as porcelain1 to preventrusting.

The plow point 14 and plow share 15 are preferably separable, each beingsecured against the face of the wing 12 of the frog. The land side 13 isbolted against the face of the` 'wing 11 of the frog, its forward edge13 being beveled and interlocked with an appropriate groove in the underface of the plow point substantially in the manner shown and describedin my prior Patent No. 1,140,275, issued May 18, 1915.

The plow share comprises a plate15 rigidly secured against the face ofthe wing 12 I of the frog by means of screws 34 threaded into dependinglugs 35, seated in openings 3G in the wing 12 so as toprovide aninterlocking engagement therewith. The plate 15`carries a series ofrotatable cutting disks 37 so disposed that vthe beveled cutting edgesthereof overhang thel edge 38 of the plate and constitute the cuttingedge of the plow share. As shown, particularly in Figure4`, each disk 37is journaled upon the round shank 39 ofV a bolt 40, the bolt beingsecured in an eccentric 41 adjustably mounted in an appropriate socket42 formed in the under faceof the plate 15. 'Each eccentric is locked inany desired position of adjustment by means of a key 43 seated in asocket 44 in the under face of the plate 15 and engageable with theserrated edge 45 of the eccentric. In use, the peripheries of theseveral disks are preferably retained in slight overlapping relation. Asthey become worn, they may be adjusted toward each other by withdrawingthe key 43 and rotating the eccentric 41'until the desired position isattained, in which position the eccentric is again locked by therreinsertion of the key.

ln order to keep the edges of the disks in a sharp condition, a suitableabrasive element 46 may be provided in a socket 47 in the plate 15 whereit is maintained in contact with the cutting edge of the disk. It isunderstood, of course, that during the operation of the plow thereaction ofthe soil against the disks causes them to rotate continuouslyin one direction. This rotation of each disk against its abrasiveelement maintains the disks in a sharp condition and thus insures aclean cutting of the soil and all roots encountered.

The plow share is also preferably provided with a series of conduits orducts 4S', each leading to a point beneath a disk, through which apowder or fluid may be distributed for killing weeds, beetles or othervermin that might otherwise interfere with the proper growth of thecrops; These conduits may be fed from any suitable source (not shown)carried by the plow.

As shown, particularly in Figures 2 and 4, a plate 49 is secured againstthe inner face of the wing 11 of the frog and extends rearwardlytherefrom substantially parallel to the land side 13. It is secured inposition by bolts 50, one of which extends through an appropriate spacerlug 51 formed asan integral part of the land side 13. Thisplate carriesa bracket 52 bolted thereto and constituting a bearing 53 for the end ofa stub shaft 54 rotatably journaled therein. A roller 55, keyed to thisshaft, tends to sust-ain the weight of the plow and to steady the plowin its course of travel. A pulley 56 is shown secured to the roller 55which may serve as a source of power for actuat- 5 ing the powderdistributer hereinabove referred to. l'

lin order to furtherv steady the plow in its course and to facilitateentry of the plow point into the earth, the point carries aV ver-` ltically disposed sharp edged disk 58 countersunk in the side facethereof, so as to lie substantially within'the plane of the land side.As shown, this disk projects beneath the under portion of the plow. Itissecured in position by a screw 57 which, when loosened well, permits arotative adjustment of the disk to present a sharp edge to the earthwhen the edge in dull or worn. j j f Various changes may be made in theembodiment of the invention hereinabove described, without departingfrom or sacrificing any of the advantages of the invention as defined inthe appended claims.

I claim:

1. A plow having a plow share provided with a plurality of vdisksconstituting lthe cutting edge thereof, said plane of the share.

2. A plow having-a plow share'provided with ak plurality of rotatabledisks constituting the cutting edge thereof, said disksflying in theplane of the share.

operation has become j disks lying in the 3. A plow having a plow shareprovided l and projecting beyond the edge thereof to provide a cuttingedge therefor.

6. A plow having a plow share, a series with rotatable discs vthereoncomprising reof disks rotatably mounted thereon so as to vfalvingVshares, and means associated with y turn about axes extending normal toand said disks to automatically sharpen them 10' through said share7said disks having cutwhen in operation. n 5 ting edges cooperating toform the cutting In witness whereof, I hereunto subscribe edge of saidshare. Y my name this 9th day of April, 1923. p

7. A plow having a plow share provided MATTHEW MARES.

